Hey guys,
so I found the system requirements for Battlefield 3.  It needs quite a system to run luckily most people have quad cores these days.  The following link is from Nvidia and it will run a system analyzer to see if your gpu is up to the task of running it on high. 
http://www.geforce.com/GamesandApps/games/battlefield-3/GPUAnalyzer

Minimum System Requirements

• OS: Windows Vista (SP2) 32-bit
• Processor: 2 GHz Dual Core (Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz)
• Memory: 2 GB
• Hard Drive: 20 GB
• Graphics Card (NVIDIA): DirectX 10.0 Compatible with 512 MB RAM (NVIDIA GeForce 8, 9, 200, 300, 400 or 500 series with NVIDIA GeForce 8800 GT or higher performance)
• Graphics Card (ATI): DirectX 10.0 Compatible with 512 MB RAM (ATI Radeon 3000, 4000, 5000 or 6000 series with ATI Radeon 3870 or higher performance)
• Sound Card: DirectX Compatible
• Keyboard and Mouse
• DVD ROM Drive

Recommended System Requirements

• OS: Windows 7 64-bit
• Processor: Quad-core CPU
• Memory: 4 GB
• Hard Drive: 20 GB
• Graphics Card: NVIDIA GeForce GTX 560
or ATI Radeon 6950
• Sound Card: DirectX Compatible
• Keyboard and Mouse
• DVD ROM Drive

Will be trying out the Beta tomorrow for the PC with my current GTX 460 in 1080P and see how it runs and will post back with the results :)